CBSE Class 3 Mathematics 4 Digit Numbers Assignment

Add the following (with carrying)

Questions.

Answer : a) 6999 b) 6788 c) 8888 d) 7796 e) 5479 f) 9697

Questions.

Answer : a) 9419 b) 12411 c) 12001 d) 18319 e) 15510 f) 13602

Word problem based on Addition :

Question. A car travelled 1445 Km. in one month and 3467 Km. in another. How much did it travel altogether?

Answer : 4912

Question. There were 6325 boys and 2635 girls in a school. How many children were there altogether in the school.

Answer : 8960

Question. A box contain 3630 marbles and another box has 4678 marbles. How many marbles are there altogether?

Answer : 8308

Question. If one farmer has 2698 cows and another has 3645 cows, how many cows do they have altogether?

Answer : 6343

Question. There were 1073 passengers were travelling in one train and 1840 in another. How many passengers were travelling in both the trains?

Answer : 2913

4 Digit Numbers

Question 1. Fill in the blanks using \(>\) or \(<\)
a) 1762 \(\gt\) 1726
b) 8990 \(\lt\) 8991
c) 2089 \(\lt\) 2980
d) 1675 \(\lt\) 1765
e) 6354 \(\gt\) 3456
f) 8670 \(\gt\) 6870
g) 9135 \(\gt\) 1395
h) 9650 \(\gt\) 5096
i) 8436 \(\gt\) 6348
j) 6150 \(\lt\) 6151
Answer: Compare numbers starting from the leftmost digit (thousands place). If they are equal, compare the hundreds place, then tens, and finally units.
In simple words: Compare the numbers from left to right to find which number is larger or smaller.

Exam Tip: The open side of the symbol always points towards the greater number (e.g., \(5 \gt 3\) means 5 is greater than 3).

Question 2a. Encircle the largest number:
a) 4621, 6421, 2461, 1646
b) 8676, 8766, 8667, 7886
c) 5493, 4935, 5943, 5439
d) 9083, 9038, 9099, 9008
e) 6541, 6451, 6145, 6514
f) 7909, 9079, 9097, 7990
Answer: Compare the thousands place first. If the thousands digits are the same, compare the hundreds place, and so on, to identify the maximum value in each group.
In simple words: Look at the thousands place first to find the biggest number in the list.

Exam Tip: If thousands digits are identical, move to the hundreds digit to break the tie.

Question 2b. Encircle the smallest number:
a) 1802, 2081, 1208, 1208
b) 7840, 4087, 4078, 478
c) 3095, 3059, 3950, 3590
d) 6056, 6156, 1565, 1651
e) 2340, 2430, 2304, 2403
f) 1975, 1976, 1974, 1970
Answer: Compare the digits from left to right to find the minimum value in each group.
In simple words: Look for the number that starts with the smallest digit.

Exam Tip: Note that 478 in row (b) is a 3-digit number, which is naturally smaller than any 4-digit number.

Question 3. Write the greatest and the smallest 4-digit number in the given digits:
Answer:
To form the greatest number, arrange the digits in descending order from left to right. To form the smallest number, arrange the digits in ascending order from left to right (ensuring that zero is not placed at the thousands place if possible, though here zero is placed second for valid 4-digit numbers).

In simple words: Biggest number uses biggest digits first. Smallest number uses smallest digits first (avoiding starting with zero).

Exam Tip: When forming the smallest 4-digit number from digits containing 0, never put 0 in the first place from the left.

Question 4a. Arrange in descending order or decreasing order:
a. 5439, 6295, 1967, 3459 \(\rightarrow\) 6295, 5439, 3459, 1967
b. 6834, 8634, 4368, 6438 \(\rightarrow\) 8634, 6834, 6438, 4368
c. 9157, 9517, 9175, 9751 \(\rightarrow\) 9751, 9517, 9175, 9157
d. 1656, 6531, 5631, 6351 \(\rightarrow\) 6531, 6351, 5631, 1656
e. 2008, 2009, 1008, 8001 \(\rightarrow\) 8001, 2009, 2008, 1008
f. 1567, 7651, 1965, 1635 \(\rightarrow\) 7651, 1965, 1635, 1567
Answer: Arrange the given numbers from the largest to the smallest.
In simple words: Descending order means going down from the biggest number to the smallest number.

Exam Tip: Check off each number as you write it down so you do not miss any.

Question 4b. Arrange in ascending order or increasing order:
a. 1561, 6511, 1651, 1615 \(\rightarrow\) 1561, 1615, 1651, 6511
b. 3035, 3053, 3003, 3039 \(\rightarrow\) 3003, 3035, 3039, 3053
c. 1078, 1870, 1708, 1807 \(\rightarrow\) 1078, 1708, 1807, 1870
d. 2176, 6712, 7612, 2176 \(\rightarrow\) 2176, 2176, 6712, 7612
e. 7126, 7216, 6217, 6712 \(\rightarrow\) 6217, 6712, 7126, 7216
f. 4335, 5334, 3345, 4353 \(\rightarrow\) 3345, 4335, 4353, 5334
Answer: Arrange the given numbers from the smallest to the largest.
In simple words: Ascending order means going up from the smallest number to the biggest number.

Exam Tip: When numbers have the same thousands digit, carefully compare their hundreds digits.